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Thermo Scientific Forma™ Environmental Chambers

By Thermo
Thermo Scientific Forma™ Environmental Chambers

Perform a variety of applications withThermo Scientific™ Forma™ environmental chambers, which can be configured for a variety of purposes and are available in multiple capacities. With a wide range of accessories and years of experience in constructing cabinets, we can construct units to match your most stringent applications.

Broad Range of Features and Controls:

  • Wide temperature range of 0° to 60°C that enhances the flexibility of the unit
  • Relative humidity control via steam generator from above ambient to 95% at 37°C (not available w/Cat. No. 50-3920)
  • Sophisticated digital controls
  • Programmable ramp and soak cycles for temperature and RH
  • Durable cabinets with true laminar airflow through side plenums for extremely tight uniformity
  • Phenolic-coated evaporator for use in applications that create corrosive byproducts
  • Manual control of defrost and refrigeration cycles
  • Visible/audible safety alarms alert to over- and undertemperature conditions, deviation of humidity from set parameters (except Model 3920)

Durable Construction:

  • Cold-rolled steel, powder-coated cabinet
  • 2 in. (5.1cm) thick, CFC-free, foamed-in-place polyurethane insulation
  • Stainless-steel interior with solid stainless-steel adjustable shelves
  • Directed horizontal airflow system for excellent uniformity
  • Locking swivel casters for easy mobility during installation and cleaning
  • Leveling feet for stability and added safety in the lab

Broad Range of Options:

  • Interior lighting for Models 3920, 3940, and 3949 (optional)
  • Reinforced shelving and flooring for heavy loads
  • Heatless dryer for lower humidity levels
  • Access ports for probes, sensors
  • Interior convenience receptacles
  • CO2 (IR sensor)
  • 6 in. and 12 in. temperature chart recorder
  • Other custom options available

50-3920 50-3940 50-3911
Physical Properties 29 cu. ft. Reach-In Refrigerated Incubator Environmental Chamber with heating/cooling 29 cu. ft. Stability Chamber with heating/cooling/humidity control 11 cu. ft. Stability Chamber with heating/cooling/humidity control
Temperature Temp. Range 0°C to 60°C (32°F to 140°F)
Controller, Sensor Watlow Microprocessor - PID, with RTD sensor
Display Digital dual LED, 0.1°C steps readability & setability
Programmability Single setpoint, ramp & soak (to 40 steps)
Temp. Uniformity ≤±0.3°C (@20 to 37°C)
Temp. Stability ≤±0.1°C (@20 to 37°C)
Temp. Safety Adjustable over- and under-temperature thermostat with analog reference dial, audible/visual alarm
Compressor 1/4 HP, air-cooled
Refrigerant Non-CFC, R134A refrigerant
Humidity Water consumption/specification N/A Max. 14L per day / 3.7 gal per day; demineralized water, resistance: 0.5 - 1 MΩ cm
Input water pressure N/A Gravity to 40 psi (2.76 bar)
Relative humidity range N/A Above ambient to 95% @ 37°C (98.6°F) ±5.0% RH
Controller, sensor N/A Watlow Microprocessor - PID, with capacitive sensor - thin film polymer
Display N/A Digital dual LED, 1% RH steps readability & setability
Programmability N/A Single setpoint, ramp & soak (to 40 steps)
Humidity safety N/A Audible / visual alarm in case of deviation from setpoint
Water connection N/A Fill port: 1/8" female NPT, drain port: 3/8" FPT & 3/8" O.D. P-trap right rear, intial fill approx. 1L/1qt.
Electrical Voltage 120V, 60Hz, 16.0 Amps 3 Wire (including ground) 208-220V, 60 Hz, 15.0 Amps 4 Wire (including ground) single phase
Plug NEMA 5-20P NEMA 14-20P
Power switch 2-Pole
Data output 4-20 milliamp, temperature 4-20 milliamp, temperature and PH
Chamber Dimensions Exterior (W x H x D) 965 x 2248 x 813mm 965 x 1308 x 813mm
Interior (W x H x D) 787 x 1524 x 686mm 787 x 609 x 686mm
Shelving Materials Solid stainless steel, reinforced
No. of shelves 6/19 6/19 3/11
Shelf size (W x D) 778 x 656mm
Shelf surface area 0.5m2 / 5.4 ft2
Load per shelf 15.9 kg / 35 lbs slide in/out; 22.7 kg / 50 lbs stationary; not to exceed 272 kg / 600 lbs total per cabinet

Cat.No. Name Model Voltage EA    
50-3920 Forma™ Reach-In Refrigerated Incubator Chamber, 29 cu. ft. 3920 120V $20703.00
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50-3911 Forma™ Stability Chamber, 11 cu. ft. 3911 208-220V $25029.00
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50-3913 Forma™ Stability Chamber, 11 cu. ft. 3913 220-240V $25029.00
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50-3940 Forma™ Stability Chamber, 29 cu. ft. 3940 208-220V $27089.00
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50-3949 Forma™ Stability Chamber, 29 cu ft. 3949 220-240V $26986.00
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